Pitman connection.



E. NORRBOM.

PITMAN CONNECTION.

APPLICATION FILED JAN-8.1918.

Patented Dec. 31, 1918.

' WITNESSES A TTOM/fYS hair ENOCK NORRBOM, 0F BROOKLYN, NEW YORK.

PITMAN CONNECTION.

1,289,882. I Original application filed July 20, 1917,

Specification of Letters Patent.

7 1918. Serial No. 210,871.

To all whom it may concern.

Be 1. known that I, Enocn NORRBOM, a citizen of the United States, and aresident of the city of New York, borough of Brooklyn, in the county ofKings and State of New York, have invented new and Improved PitmanConnections, of which the following is a full, clear, and exactdescription.

This invention relates to machine elements and has particular referenceto pitm-an connections.

Among the objects of the invention is to provide a simple, strong anddurable connection between an engine piston and the connecting rod forthe crank shaft of an engine of the novel type shown and claimed in anapplication for Letters Patent of the United States filed by me on the20th day of July 1917, Serial No. 181,7 5), and of which applicationthis is a division.

More specifically stated the object of this improvement is to provide apitman connection that possesses maximum strength and durability, butwhich occupies a minimum amount of space with respect both to the directconnection and the clearance provided for the oscillation of the pitman.

With the foregoing and other objects in view the invention consists inthe arrangement and combination of parts hereinafter described andclaimed, and while the invention is not restricted to the exact detailsof construction disclosed or suggested herein, still for the purpose ofillustrating a prac tical embodiment thereof reference is had to theaccompanying drawings, in which like reference characters designate thesame parts in the several views, and in which Figure 1 is a verticalsectional view on the line 1 1 of Fig. 2; and

' Fig. 2 is a similar view on the line 2-2 of Fig. 1.

Inasmuch as my improvement was designed primarily for use in connectionwith the special type of engine above. referred to I employ the enginestructure in illustrating the novel features of this specification, andwhile I refer to the engine parts for the purpose of illustration, Iwish it to be distinctly understood that the practice of thisimprovement is not intended to be so limited by any means.

v 13 indicates a connecting rod which is presumed to be connected withthe crank shaft as usual and provided at its upper end with a T-head14:. 15 represents in the drawlngs an engine piston adapted to re-'ciprocate for the usual punpo'ses in a cyl-' inder 16. For generalpurposes the piston may be regarded as a crosshead, and the cylinder 16as a guide in which the crosshead reciprocates. The piston, however, isprovided with a downwardly projecting tubular cylinder extension 17having a smooth outer surface acting as a piston in a boss 18constituting a part of the base 19 of the main cylinder.

The piston 15 is centrally tapped at 21 to receive the threaded shank 22of a two part anchor block 23 fitted into the interior of the extension17. two substantially similar parts, the only difference being that oneis countersunk at 24: for the head of a binding screw 25 extendingtherethrough into the other block part.

These block elements are provided with transverse registering holes 26into which the ends of the T-head 14: project, the T- head beingcylindrical and adapted to rock in the bearing holes 26 in accordancewith the rotation of the crank shaft or the oscillation of theconnecting rod according to the" construction or action of the machineto which the lower end of the connecting rod is attached.

The lower ends of the block elements are cut away at 27 to provide aclearance for the upper end ofthe connecting rod while making itsoscillations in the block 23.

In assembling these parts the block elements are slipped upon the endsof the head 14 and clamped together by the screw 25. The anchor block isthen projected into its place in the crosshead, and relative rotationbetween the crosshead and the anchor block is then set up to tighten theblock in the crosshead. The shoulder portion of the main part of theblock is formed conical or frusto-conical at 23* whereby the block actsas a wedge so as to bind snugly into the piston as a result of theaction of the threaded shank 22. It will thus be seen that theconnecting rod is fixed most reliably in the piston or what might betermed a crosshead with respect to the oscillatory member 13 PatentedDie-e31, acre."

Serial No. 181,7e3. Divided and this application filed January 8,

This block consists of in such a manner as to bring the connection Iwell within the body of the piston or crosshead. It is further to benoted that there come loose in practice. Even though the screw 25 mightbe omitted there is yet positive and reliable anchorage provided for theconnecting rod so long as the anchor block is tapped into the piston orcrosshead.

I claim:

1. In a device of the character set forth, the combination with aguideivay and a crosshead adapted to reciprocate therein, said erossheadbeing provided with a hollow extension terminating in a threaded socket,of a connecting rod having a cylindrical T-head projecting into saidhollow extension, and a two part anchor block having alined bearingopenings to receive the ends of the cylindrical T-head, said blockhaving a threaded shank adapted to screw tightly into said threadedsocket to hold the block from endwise movement with respect Lasaeaa tothe crosshead While the hollow extension serves to prevent lateralseparation of the two parts thereof.

2. The combination with a crosshead adapted to reciprocate along aguideway and having a central hollow extension formed with afrusto-conical seat, of a connecting rod having a journal and an anchorblock having a bearing in which the journal of the connecting rod isfitted, said block and adjacent end of the connecting rod heing fittedinto the hollow extension of the crosshead, the anchor hlock having afrusto-conical shoulder and a threaded shank adapted to project into thethreaded socket, whereby the anchor block is fixed snugly in thecrosshead extension and the connecting rod held from separationtherefrom.

ENOCK NORR ROM.

